Need help with a friend who is flirting with Suicide?

I need help with a woman who is desperate. She is so sad but I don't know the right words to say. She has had a difficult few years. I know she has a drinking problem (although she may not see it). She has done drugs in the past but she says she doesn't now. Last year Her and her late husband had the kids taken away from her for abandonment.She and her husband were separated. She was living with a boyfriend. Her husband would leave for work and she would come in and take care of the kids. Well she was a little late and a nosy neighbor found out and called the police and they took them out. They were working to get back the kids when her she has got into it AGAIN with her boyfriend and called her husband and he was coming to rescue her. Well he got her and took off with her when her boyfriend jumped in his vehicle and followed them. The men got out of the vehicles and started to fight. Well it ended up costing her husband his life. They supposedly both had a knife and he was stabbed. She said it wasn't intentional but the fact remains it happened. Even though she was not IN LOVE with him she still loved him and they were like best friends.So from then on she had to work harder to get the kids back. She did in December but the boyfriend (out on bail) came back around and started to do things for her. She said she noticed a change in him and she still loved him. Supposedly no more abuse and what not. Well one morning the social worker came by to have her sign papers and found the guy in her house. That made her lose all her parental rights. She was not supposed to have contact with him. She realizes it was a mistake but it happened so lets move on. She has gotten into a self destructive pattern recently. More drinking and stuff. Well today I logged onto facebook and i see random thought she has put on there Some hinting to "ending it all". I know it is a cry for help.From what I hear she has blocked certain people on Facebook but not me. I want to help but I just don't know what to say. What do you say to a woman who has lost everything GOOD in her life. I know Death is not the answer but I need more than that. I know to tell her to seek help at the hospital but I dont even know where she is. If I don't hear from her buy tomorrow morning I am going to send the police to do a welfare check at her home. What in the mean time.What do I do or say?